docs: def get_night_light_state(self):
          """Return the state of the night light (on/off)."""
          if not self.camera_extended_properties:
              return None
  
          night_light = self.camera_extended_properties.get('nightLight')
          if not night_light:
              return None
  
          if night_light.get('enabled'):
              return 'on'
  
          return 'off'